Our security model in a nutshell
AES-256 encryption (the world's leading standard), with 10,000+ rounds of PBKDF2 salt. Open source, yet remains uncracked. Widely-accepted as the strongest encryption there is. See a sample encrypted data here.
The key that encrypts your data is derived from your Master Password. There is by default NO RECORD of them anywhere in the universe – not on your device, never on our servers and never transmitted on the web.
You can choose to have your private, encrypted data never leave your device. Or, seamlessly sync your data (AES-256 encrypted, of course,) via our servers to multiple devices.